Portable blowing device

ABSTRACT

A portable blowing device includes a body and fans arranged in the body. Air channels are arranged in the body and extend in the length direction of the body to allow airflow to pass through. Wind shields are arranged in the air channels, and a periphery of the wind shield is closely connected with a side wall of the air channel so that a sub-air channel is formed between the wind shield and the side wall of the air channel. Air outlets are formed in the side wall for communicating with outside and the sub-air channel, and airflow generated by the fan can enter the sub-air channel and then exits the air outlets. Because of the reduced volume of the sub-air channel, the airflow is concentrated after entering the sub-air channel, and airflow exiting the air outlets is strengthened, so that the cooling effect and the user experience are improved.

TECHNICAL FIELD

The present disclosure relates to the technical field of coolingdevices, in particular to a portable blowing device.

BACKGROUND

With people's growing request for a more convenient life in recentyears, various portable fans such as neck fans have appeared in themarket to meet the needs in outdoor activities or other life scenes.Neck fans break the activity limitation of hand-held fans. Whether it isduring exercise and outdoor activities or in the office, neck fans canachieve the effect of blowing air anytime and anywhere while freeingusers' hands.

An existing neck fan generally comprises a support for resting on theneck of a human body and a fan located in the support. An air channelcorresponding to the fan is arranged in the support, air outletscommunicating with the outside are arranged on a side wall of the airchannel, and airflow generated by the fan enters the air channel andthen is blown out from the air outlets, thereby cooling the neck of thehuman body. However, because the air channel of the existing fan isdirectly formed by an inner side wall of a housing of the support, thevolume of the air channel is quite large, making the airflow generatedby the fan dispersed after reaching the air channel, so the airflowblown out from the air outlets is weak and the cooling effect is poor,which affects the user experience.

BRIEF SUMMARY OF THE INVENTION

The purpose of this present disclosure is to provide an improvedportable blowing device. By arranging a wind shield in an air channel ofa support, a sub-air channel with a reduced volume is formed in the airchannel. Airflow generated by the fan enters the sub-air channel andthen is blown out from air outlets. Due to the volume of the sub-airchannel is reduced compared to the air channel, the airflow generated bythe fan is concentrated after entering the sub-air channel, and theairflow blown out from the air outlets is strengthened, so that thecooling effect and the user experience are improved.

In one aspect, the present disclosure provides a portable blowing devicecomprising a body for being hung around a neck of a human body and fanspositioned in the body, wherein air channels corresponding to the fansare arranged in the body, and the air channels extend in the lengthdirection of the body. A wind shield is arranged in the air channel, andthe wind shield is closely connected with a part of a side wall of theair channel, so that a sub-air channel is formed between the wind shieldand the other part of the side wall of the air channel. Air outletscommunicating with the outside are formed in the side wall of thesub-air channel, and airflow generated by the fan enters the sub-airchannel and then is blown out from the air outlets.

In some embodiments, the body comprises a connector and a first supportand a second support respectively connected to two ends of theconnector. The fans and driving devices for driving the fans to run arerespectively arranged in the first support and the second support. Thefirst support and the second support each comprise an outer side wallaway from the neck of the human body and an inner side wall close to theneck of the human body. The driving device in one of the first supportand the second support is fixed on the outer side wall, and the drivingdevice in the other of the first support and the second support is fixedon the inner side wall.

In some embodiments, the body comprises a support. The fan, the airchannel and the wind shield are arranged in the support. An air guidingmember is arranged in the sub-air channel to divide the sub-air channelinto a first sub-air channel and a second sub-air channel. A side wallof the support comprises a first section and a second section located onboth sides of the air guiding member. The first section is provided withfirst air outlets communicating with the first sub-air channel, and thesecond section is provided with second air outlets communicating withthe second sub-air channel.

Preferably, the support comprises an inner side wall close to the neckof the human body and an outer side wall away from the neck of the humanbody. The first air outlets and the second air outlets are arranged onthe inner side wall. A starting end of the air guiding member divides aninlet of the sub-air channel into a first air inlet and a second airinlet. The first air inlet and the second air inlet respectivelycommunicate with the first sub-air channel and the second sub-airchannel, and the area of the first air inlet is smaller than that of thesecond air inlet.

According to the portable blowing device provided in the presentdisclosure, the wind shield is arranged in the air channel of thesupport to make a portion of the air channel to form a sub-air channelwhich has a reduced cross-sectional area and therefore a reduced volume.Airflow generated by the fan enters the sub-air channel and then isblown out from the air outlets. Due to the reduced volume of the sub-airchannel formed by the wind shield, the airflow generated by the fan isconcentrated after entering the sub-air channel and wind blown out fromthe air outlets is strengthened, so that the cooling effect and the userexperience are improved.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a perspective assembled view of a portable blowing deviceaccording to Embodiment 1 of the present disclosure.

FIG. 2 is a partially exploded view of FIG. 1.

FIG. 3 is another partially exploded view of FIG. 1.

FIG. 4 is a sectional view of a first support of the portable blowingdevice of FIG. 1.

FIG. 5 is a perspective exploded view of a portable blowing deviceaccording to Embodiment 2 of the present disclosure.

FIG. 6 is a sectional view of an inner case of the portable blowingdevice of FIG. 5.

FIG. 7 is a perspective exploded view of a portable blowing deviceaccording to Embodiment 3 of the present disclosure.

FIG. 8 is a perspective view of a portable blowing device according tothe Embodiment 4 of the present disclosure.

FIG. 9 is a partially exploded view of the portable blowing device inFIG. 8.

FIG. 10 is another partially exploded view of the portable blowingdevice in FIG. 8.

FIG. 11 is a partial structural sectional view of the portable blowingdevice in FIG. 8.

FIG. 12 is a perspective view of a portable blowing device according toEmbodiment 5 of the present disclosure.

FIG. 13 is a cross-sectional view of the portable blowing device shownin FIG. 12 taken along line A-A.

FIG. 14 is an exploded view of the portable blowing device shown in FIG.12.

FIG. 15 is a structural diagram of a fan and a driving device of theportable blowing device shown in FIG. 14.

FIG. 16 is an exploded view of a support of the portable blowing deviceshown in FIG. 14.

FIG. 17 is an exploded view of another support of the portable blowingdevice shown in FIG. 14.

FIG. 18 is an assembled view of a portable blowing device according toEmbodiment 6 of the present disclosure.

FIG. 19 is an exploded view of the portable blowing device in FIG. 18.

FIG. 20 is an exploded view of a support of the portable blowing devicein FIG. 18, showing the placement of the fan.

FIG. 21 is an exploded view of a portable blowing device according toEmbodiment 7 of the present disclosure.

FIG. 22 is a view of an inner case of the portable blowing deviceaccording to Embodiment 7 of the present disclosure.

FIG. 23 is a sectional view of FIG. 22 taken along line A-A.

FIG. 24 is a perspective view of a portable blowing device according toEmbodiment 8 of the present disclosure.

FIG. 25 is a perspective view of a portable blowing device according toEmbodiment 9 of the present disclosure.

FIG. 26 is an exploded view of the portable blowing device in FIG. 25.

FIG. 27 is another exploded view of the portable blowing device in FIG.25.

FIG. 28 is a perspective view of a flexible connection structure of theportable blowing device in FIG. 25.

FIG. 29 is an exploded view of the flexible connection structure in FIG.28 before injection molding.

FIG. 30 is a structural diagram of a portable blowing device accordingto Embodiment 10 of the present disclosure.

FIG. 31 is a partly exploded view of the portable blowing deviceaccording to Embodiment 10 of the present disclosure.

FIG. 32 is an exploded view of the portable blowing device according toEmbodiment 10 of the present disclosure.

FIG. 33 is a side view of a first inner housing according to Embodiment10 of the present disclosure.

FIG. 34 is another exploded view of the portable blowing deviceaccording to Embodiment 10 of the present disclosure.

FIG. 35 is a side view of a first inner housing of a portable blowingdevice according to the Embodiment 11 of the present disclosure.

FIG. 36 is a structural diagram of a portable blowing device accordingto Embodiment 12 of the present disclosure.

FIG. 37 is a partly exploded view of the portable blowing device of FIG.36.

FIG. 38 is an exploded view of the portable blowing device of FIG. 36.

DETAILED DESCRIPTION OF THE INVENTION

In order to further explain the technical means and efficacy adopted bythe present disclosure to achieve the intended purpose of the presentdisclosure, the specific implementation mode, structure, characteristicsand efficacy of a portable blowing device according to the presentdisclosure are described in detail as follows with reference to theattached drawings and preferred embodiments.

Embodiment 1

As shown in FIG. 1 to FIG. 4, a portable blowing device for example aneck fan in accordance with a first embodiment of the present disclosurecomprises a body 10 for resting on the neck of a human body and fans 20disposed in the body 10. Air channels 230 corresponding to the fans 20are arranged in the body 10, and the air channels 230 extend along thelength of the body 10 (i.e., a circumference of the neck), that is, theextending direction of the air channels 230 and the extending directionof the body 10 are the same. A wind shield 40 is arranged in the airchannel 230. Preferably, a periphery of the wind shield 40 is closelyconnected with a part of a side wall of the air channel 230, so that asub-air channel 231 is formed between the wind shield 40 and the otherpart of the side wall of the air channel 230. Air outlets 232communicating with the outside are formed in the other part of the sidewall of the air channel 230 corresponding to the sub-air channel 231.Airflow generated by the fan 20 is capable of entering the sub-airchannel 231 and then exiting the sub-air channel 231 via the air outlets232.

According to the neck fan provided in the present embodiment, the windshield 40 is provided in the air channel 230 of the body 10 to form thesub-air channel 231 in the air channel 230. Airflow generated by thefans 20 enters the sub-air channels 231 and then exits the air outlets232. Compared with the air channel 230, the sub-air channel 231 has areduced cross section area and therefore a reduced volume. The airflowgenerated by the fans 20 is concentrated after entering the sub-airchannel 231, and airflow blown out from the air outlets 232 isstrengthened, so that the cooling effect and the user experience areimproved.

Specifically, in the present embodiment, the wind shield 40 is anindependent member arranged in the body 10. The body 10 comprises afirst support 11, a second support 13 and a flexible connector 12connecting the first support 11 with the second support 12. Each of thefirst support 11 and the second support 13 is provided with the airchannel 230 and the wind shield 40 located in the air channel 230. Theends, away from the flexible connector 12, of the first support 11 andthe second support 13 are respectively provided with the fans 20. Theflexible connector 12 comprises a soft rubber sleeve 121 and a bendingand shaping member 122 located in the soft rubber sleeve. Two oppositeends of the bending and shaping member 122 are respectively connectedwith locking members 123. The ends of the first support 11 and thesecond support 13 are respectively provided with locking grooves111/131, and the locking members 123 are locked in the locking grooves111/131, so that the flexible connector 12 connects the first support 11with the second support 13 to form the whole body 10. It isunderstandable that the structure of the flexible connector 12 is notlimited to the structure described in detail above, so long as it enablethe body 10 be bent or straightened to enlarge or reduce the openingformed between the first and second supports 13. In the presentembodiment, the body 10 is configured to comprise the flexible connector12, the first support 11 and the second support 13, so that the body 10can be bent, straightened or deformed at the flexible connector 12,which enables a user to bend, straightened or deform the body 10 to wearit on the neck easily. Specifically, in the present embodiment, thebending and shaping member 122 is a metal hose.

In other embodiments, if the body 10 has a large enough opening formedbetween the first and second supports 13 to allow the user to wear it,the body 10 may not comprise the flexible connector, that is, theflexible connector is omitted and the body 10 is formed as a one-piececomponent. Two ends of the one-piece body 10 are respectively providedwith the fans 20, and the air channels 230 and the sub-air channels 231corresponding to the fans 20 are arranged between the two fans 20.Alternatively, one or two fans 20 may be arranged in the middle of thebody 10, and air channels 230 and sub-air channels 231 corresponding tothe fans 20 are respectively arranged on both sides of the body 10.

Further, the first support 11 and the second support 13 respectivelycomprise first housings 112/132 and second housings 113/133, and thefirst housings 112/132 and the corresponding second housings 113/133cooperatively form the air channels 230 after being assembled together.The fan 20 in the first support 11 is disposed at an end, away from theflexible connector 12, of the first support 11. The fan 20 in the secondsupport 13 is disposed at an end, away from the flexible connector 12,of the second support 13. The air channels 230 of the first support 11and the second support 13 are separated by the flexible connector 12.

The wind shield 40 comprises a shielding part 41 extending along thelength direction of the corresponding air channel 230, and a connectingpart 42 connected to one end of the shielding part 41 facing thecorresponding fan. One end of the connecting part 42 is connected withthe shielding part 41, and the other end abuts against the part of theside wall of the air channel 230, so that the sub-air channel 231 isformed between the wind shield 40 and the other part of the side wall ofthe air channel 230. Airflow generated by the fan 20 enters the sub-airchannel 231 and then is blown to the outside from the air outlets 232.In the present embodiment, the wind shield 40 divides the correspondingair channel 230 into the corresponding sub-air channel 231 and a cavity233 which does not communicate with the sub-air channel 231. Thus, thewind shield 40 can prevent the airflow generated by the fan 20 fromentering the cavity 233. A battery 50 and a circuit board 55electrically connected with the corresponding fan 20 are arranged in thecavity 233. The circuit board 55 is also electrically connected with aswitch 90 which is arranged outside the body 10. The battery 50 isconfigured to supply power to the fan 20, and the switch 90 isconfigured to control the fan 20. Preferably, a surface, facing thesub-air channel 231, of the connecting part 42 is a smooth slope, suchas a smooth straight surface or a smooth curved surface, so that theconnecting part 42 has less resistance to the airflow generated by thefan 20 and allows the airflow to enter the sub-air channel 231 moreeasily. The battery 50 is located at a position, close to the connectingpart 42, in the cavity 233 and contacts with the shielding part 41, sothat heat generated by the battery 50 during operation can betransferred to the shielding part 41 and then be taken away by theairflow generated by the fan 20 to thereby prevent the battery 50 fromoverheating.

The fan 20 has a rotation center, and the fan 20 comprises a pluralityof blades 21 arranged around the rotation center. The distance L betweenan end, close to the fan 20, of the wind shield 40 and a tangent line ofa circular rotation track formed by the ends of the plurality of blades21 is 2-7 mm. With this design, the airflow generated by the fan 20 canenter the sub-air channel 231 to the maximum extent, so that theutilization rate of the fan 20 is improved. In the present embodiment,the distance L is preferably 3-5 mm.

In the present embodiment, the body 10 is of an arc-shaped structure forfitting the neck of a user such as a human body. The body 10 comprisesan inner side wall 151 close to the neck of the human body and an outerside wall 152 away from the neck of the human body in use, and the airoutlets 232 penetrate through the inner side wall 151. In the presentembodiment, the second housings 113/133 are formed as the outer sidewalls 152 of the supports. Thus, the second housings 113/133 is alsonamed as outer housings. The first housings 112/132 are formed as theinner side walls 151 of the supports. Thus, the first housings 112/132is also named as inner housings. The first housings 112/132 and thesecond housings 113/133 are respectively provided with air inlets114/134 at positions corresponding to the fans 20, the second housings133/133 are provided with protective covers 115/135 at positionscorresponding to the air inlets 114/134, and the protective covers115/135 cover the air inlets 114/134 of the second housings 113/133 andare spaced from the air inlets 114/134. This design can effectivelyprevent the user's hair from entering the fans 20 through the air inlets114/134 of the second housings 113/133 when the user wears the neck fan.Due to the protective covers 115/135 are spaced from the air inlets114/134 with gaps formed therebetween, the fans 20 can draw externalairflow through the gaps to generate airflow.

In the present embodiment, there are a plurality of air outlets 232which are formed in the inner side walls 151 of the supports 11/13 andarranged side by side at intervals along the length of the body 10, sothat the airflow generated by the fans 20 can blow to most parts of theneck of the human body, allowing a larger cooling area and a bettercooling effect. In the present embodiment, the wind shields 40 areplate-shaped, and peripheries of the wind shields 40 closely contact theinner surfaces of the second housings 113/133, i.e., the outer sidewalls 152, so that the air channels 230 are divided into the sub-airchannels 231 located in the inner side and the cavities 233 located inthe outer side. In the present embodiment, the upper and lower sides ofthe wind shield 40 are bent and extended toward the outer side wall toform hems 404, so that a groove 406 is formed between the two hems 404.The shape of the groove 406 matches the shape of the battery 50, and thebattery 50 is at least partially located in the groove 406, so that thebattery 50 can be better positioned and firmly located in the cavity233. Of course, in other embodiments, the peripheries of the windshields 40 may closely contact the inner side walls 151 and the outerside walls 152, so that the wind shields 40 form the cavities 233 withpart of the inner side walls and the outer side walls, and the windshields 40 form the sub-air channels 231 with the other part of theinner side walls and the outer side walls. The present disclosure doesnot limit which part of the side wall of the air channel 230 the windshield 40 is connected with in the body 10. In other embodiments, thewind shield 40 can also be a rubber block with a certain thicknessformed by integrally extending from the inner side surface of the firsthousing 112/132 or the second housing 113/133, or a rubber block with acertain thickness assembled in the air channel 230 and closelycontacting with part of the side wall of the air channel 230. Thespecific shape and forming mode of the wind shield 40 are not limited inthis present disclosure, as long as a sub-air channel 231 with a reducedcross section area can be formed in the air channel 230.

Embodiment 2

The present embodiment is partially identical to Embodiment 1, and thesame parts are not repeated here. The difference is as following: asshown in FIG. 5 and FIG. 6, the first housings 112/132 and the secondhousings 113/133 are connected to form cavities therebetween, and aninner case 15 hermetically connected with an inner surface of the cavityis arranged in the cavity, that is, an outer surface of the inner case15 closely contacting with the inner surface of the cavity, the airchannel 230 is arranged in the inner case 15, and the wind shield 40 isdisposed in the air channel 230 of the inner case 15. By arranging theintegrally formed inner case 15 with the air channel 230 formed therein,after the first housings 112/132 and the second housings 113/133 areassembled to form the cavities, the integrally formed inner case 15 islocated in the cavity. Even if there are small gaps located at thejoints between the first housings 112/132 and the second housings113/133, the airflow generated by the fans 20 will not escape throughthe joints between the first housings 112/132 and the second housings113/133, thus achieving a strengthened airflow and a fast coolingeffect. Further, in a preferred solution, the inner case 15 is in theshape of a hollow tube, and the wind shield 40 is a sheet-like partitionintegrally formed in the inner case 15. The partition, i.e., the windshield 40, comprises a shielding part 41 extending along the length ofthe air channel 230 in the inner case 15 and a connecting part 42connected to an end, facing the fan 20, of the shielding part 41. Oneend of the connecting part 42 is connected with the shielding part 41,and the other end is connected with a part of the side wall of the airchannel 230, so that the sub-air channel 231 is formed between the windshield 40 and the other part of the side wall of the air channel. In thepresent embodiment, the wind shield 40 is a partition, a cavity 233 isformed between a side, opposite the sub-air channel 231, of the windshield and the side wall of the air channel, and electronic componentssuch as batteries 50 can be placed in the cavity 233. Of course, inother embodiments, the wind shield 40 can also be a rubber block with acertain thickness integrally extending from the inner side wall of theair channel 230, or a rubber block with a certain thickness assembled inthe air channel 230 and attached to the part of the side wall of the airchannel 230. The specific shape and forming mode of the wind shield 40are not limited, as long as a sub-air channel 231 with a reduced crosssection area can be formed in the air channel 230.

According to the neck fan provided in the present embodiment, the windshield 40 is arranged in the air channel 230 of the body 10, that is,the wind shield 40 is arranged in the air channel 230 of the inner case15 to form the sub-air channel 231 in the wind shields 40. Airflowgenerated by the fans 20 enters the sub-air channels 231 and then isblown out to the outside from the air outlets 232. Due to the sub-airchannels 231 has a reduced cross-section area, the airflow generated bythe fan 20 is concentrated alter entering the sub-air channel 231, andairflow blown out from the air outlets 232 is strengthened, so that thecooling effect and the user experience are improved.

In addition, in the present embodiment, the bending and shaping member122 of the flexible connector 12 is a metal sheet, screw holes arerespectively formed in the two ends of the metal sheet, and the ends ofthe first support 11 and the second support 13 are locked and connectedwith the metal sheet by screws respectively, so that the first support11 and the second support 13 are connected to the two ends of theflexible connector 12 to form the body 10 of the neck fan.

Embodiment 3

The present embodiment is partially identical to Embodiment 1, and thesame parts are not repeated here. The difference is as following: asshown in FIG. 7, the wind shield 40 integrally extends from the innersurface of the second housing 113/133, that is, the outer side of thewind shield 40 is integrally connected with the inner surface of thesecond housing 113/133, and the inner side of the wind shield 40 closelycontacts with the first housing 112/132 after the first housing 112/132and the second housing 113/133 are assembled together, so that a sub-airchannel 231 with a reduced cross-section area is formed in the airchannel 230 which is formed by the assembled first housing 112/132 andsecond housing 113/133. In other embodiments, the wind shield 40 canalso integrally extend from the inner surface of the first housing112/132, that is, the inner side of the wind shield 40 is integrallyformed with the inner side of the first housing 112/132, and the outerside of the wind shield 40 closely contacts with the second housing133/133 after the first housing 112/132 and the second housing 113/133are assembled together, so that a sub-air channel 231 with a reducedcross-section area is formed in the air channel 230 which is formed bythe assembled first housing 112/132 and second housing 113/133. It isalso possible that the wind shield 40 is formed by extension parts fromboth the first housing 112/132 and the second housing 113/133, that is,the first extension part extending from the first housing 112/132 form afirst part of the wind shield 40 and the second extension part extendingfrom the second housing 113/133 form a second part of the wind shield40, and the first and second parts of the wind shield 40 cooperativelyform the wind shield 40 after the first housing 112/132 and the secondhousing 133/133 are assembled together.

According to the neck fan provided in the present embodiment, the windshield 40 is integrally formed in the air channels 230 of the supports,that is, the wind shield 40 integrally extends from the inner surface ofthe second housings 113/133, and the sub-air channel 231 with a reducedcross-section area is formed in the air channel 230 by the wind shield40. Airflow generated by the fans 20 enter the sub-air channels 231 andthen is blown out from the air outlets 232. Due to the sub-air channels231 with reduced cross-section area, the airflow generated by the fans20 is concentrated after entering the sub-air channels 231, and theairflow blown out from the air outlets 231 is strengthened, so that thecooling effect and the user experience are improved.

Embodiment 4

As shown in FIGS. 8-11, the present embodiment provides a portableblowing device, which is also a neck fan. The neck fan is to be put onthe neck of the human body and comprises a body 10 and fans 20 arrangedin the body 10. Cavities (i.e., air channels) corresponding to the fans20 are formed in the body 10, wind shields 40 and partition members 22are arranged in the air channels, and the wind shields 40 and thepartition members 22 both extend along the length direction of the body10. In the present embodiment, the body 10 comprises a flexibleconnector 12, two supports 13 respectively connected to two oppositeends of the flexible connector 12, and batteries 50 and circuit boards(not shown) arranged in the supports 13. There are two fans 20 which arearranged in the two supports 13 respectively, for example, at an end,away from the flexible connector 12, of the support 13. The fans 20 andthe batteries 50 are electrically connected with the circuit boards toprovide power to the fans 20. In the present embodiment, since the twosupports 13 have the same structure and are symmetrically arranged, onlyone support 13 will be described below as an example.

In the present embodiment, the support 13 is of a hollow structure, thewind shield 40 is configured to divide the air channel in the support 13into a first cavity 24 and a second cavity 26, and the partition member22 is arranged in the second cavity 26 to further divide the secondcavity 26 into a sub-air channel 28 and a sub-cavity 29. Preferably, thefirst cavity 24 and the sub-cavity 29 do not communicate with thesub-air channel 28, that is, the first cavity 24 and the sub-cavity 29are both completely enclosed cavities, and airflow will not enter thefirst cavity 24 or the second sub-cavity 29 after entering the sub-airchannel 28 which communicates with the corresponding fan 20. A side wallof the support 13 corresponding to the sub-air channel 28 is providedwith air outlets 232 which communicate with the sub-air channel 28 andthe outside of the support 13, the support 13 is provided with airinlets 34 corresponding to the fan 20, so that airflow generated by thefan 20 is blown out from the air outlets 232 after passing through thesub-air channel 28. Due to the dual separation of the air channel in thesupport 13 by the wind shield 40 and the partition member 22, thecross-section area of the sub-air channel 28 can be effectively reduced.In this way, the airflow generated by the fan 20 is concentrated afterentering the sub-air channel 28, and the airflow blown out from the airoutlets 232 is strengthened, so that the cooling effect and the userexperience are improved.

In the present embodiment, the support 13 comprises a first housing 132and a second housing 133 which are engaged together, and the air channelof the support 13 is formed between the first housing 132 and the secondhousing 133. Therefore, the outer side wall of the body 10 is the secondhousing 133 of the support 13, and the inner side wall of the body 10 isthe first housing 132 of the support 13.

More specifically, the wind shield 40 is connected to an inner side ofthe outer side wall of the body 10, that is, connected to the inner sideof the second housing 133, and the wind shield 40 extends along thelength direction and width direction of the support 13, that is, thewind shield 40 has a length direction along the length direction of thesupport 13 and a width direction along the width direction of thesupport 13. The first cavity 24 is formed between an outer face of thewind shield 40 and the second housing 133, and the second cavity 26 isformed between an inner face of the wind shield 40 and the first housing112, that is, the first cavity 24 and the second cavity 26 aredistributed at intervals in the thickness direction of the support 13.The wind shield 40 is fixedly connected to the inner side of the secondhousing 133, for example, by interlocking means or screws. Opposite twosides of the partition member 22 are respectively connected with theinner side wall 132 of the support 13 and the inner face of the windshield 40, and the partition member 22 has a plate/panel shape extendingalong the length direction and the thickness direction of the support13, that is, the partition member 22 has a length direction along thelength direction of the support 13 and has a width direction along thethickness direction of the support 13. In the present embodiment, oneside of the partition member 22 is integrally connected to the innersurface of the first housing 132, and the other side of the partitionmember 22 closely contacts with the inner surface of the wind shield 40,so that the second cavity 26 is divided by the partition member 22 intothe sub-air channel 28 and the second sub-cavity 29 distributed atintervals in the width direction of the support 13.

In the present embodiment, the air outlets 232 are arranged in an areabetween the fan 20 and the flexible connector 12 on the support 13.There is a plurality of air outlets 232 arranged along the inner sidewall of the support 13, that is, extending along the length direction ofthe first housing 132. Specifically, the plurality of air outlets 232are arranged on an upper side of the first housing 132 corresponding tothe sub-air channel 28. In other embodiments, the air outlets 232 mayalso be arranged at other positions of the first housing 112corresponding to the sub-air channel 28.

In the present embodiment, both the wind shield 40 and the partitionmember 22 are in the shape of arc panels adapted to the shape of thesupport 13 in the length direction of the support 13, and the ends,close to the fan 20, of the wind shield 40 and the partition member 22are designed as smooth slopes 23, so that the airflow generated by thefan 20 can flow into the sub-air channel 28 more smoothly, effectivelyreducing the noise caused by the airflow hitting the partition member 22and the wind shield 40. In the present embodiment, the partition member22 acts as an air guiding member for guiding the airflow generated bythe fan 20 into the sub-air channel 28.

The battery 50 and the circuit board can be arranged in the first cavity24 or the sub-cavity 29, so that electronic components such as thebattery 50 and the circuit board are separated from the sub-air channel28, which avoids obstructing the airflow generated by the fan 20 andrealizes a compact structure. In the illustrated embodiment, there aretwo batteries 50 which are respectively arranged in the first cavities24 of the two supports 13, and the circuit board can be arranged in thefirst cavity 24 of one of the supports 13.

In the present embodiment, the air inlets 34 and the protective covers43 are similar to that in Embodiment 1, which will not be repeated here.

In the present embodiment, a switch 90 is arranged on the outer sidewall of the second housing 133, and the switch 90 is electricallyconnected with the circuit board and configured to control the start andstop of the fan 20. The switch 90 is a push-button switch, and aninstallation hole 46 is formed in the outer side wall of the secondhousing 133. The switch 90 is installed in the installation hole 46 andprotrudes from the outer face of the second housing 133 for the user topress.

The flexible connector 12 comprises a bending and shaping member 122 anda soft rubber sleeve 121 covering the bending and shaping member 122.Two ends of the bending and shaping member 122 are respectively sleevedwith metal sleeves 52 which are enclosed by the soft rubber sleeve 121.When the flexible connector 12 is connected with the support 13, asmooth transition is formed between an outer surface of the soft rubbersleeve 121 and an outer surface of the support 13. By sleeving the twoends of the bending and shaping member 122 with the metal sleeves 52respectively, bending and deformation of the two ends of the flexibleconnector 12 can be effectively prevented, to thereby avoid gaps betweenthe two ends of the flexible connector 12 and the supports 13 becominglarger.

The flexible connector 12 enables the orientation of the air outlets 232of the neck fan 10 to be adjustable through bending and twisting theflexible connector 12, so that the airflow flowing Gut of the airoutlets 232 can blow toward different parts of the human body such asthe neck or the face of the human body. The bending and shaping member122 can take and maintain any shape through bending and twisting, andthe shape of the soft rubber sleeve 121 can be changed with the shape ofthe bending and shaping member 122. The bending and shaping member 122can be a metal hose, a serpentine tube, a shaping steel wire, or othermembers made of a material making the flexible connector 12 have a shapememory function so that the flexible connector 12 can maintain its shapeafter being bent. The soft rubber sleeve 121 can be made of soft rubbersuch as TPU soft rubber.

The two ends of the flexible connector 12 are respectively locked andconnected with the two supports 13. More specifically, two ends of thesoft rubber sleeve 121 are respectively provided with connectingportions 54 for extending into connecting ends of the supports 13, theinner side wall of the second housing 133 is provided with a fixing base56 which is provided with a screw hole. During assembly, an end of thebending and shaping member 122 extending out of the metal sleeve 52 andthe connecting portion 54 penetrates into the connecting end of thesupport 13 and extends through the fixing piece 58 and is locked by thefixing base 56 and the fixing piece 58. The fixing piece 58 is of afixing sheet structure which is arched toward one side to form a groove.Fixing holes are provided at opposite ends of the fixing piece 58. Thefixing base 56 is provided with a recess corresponding to the end of thebending and shaping member 122. During installation, the fixing piece 58is attached to the fixing base 56 with the groove of the fixing piecealigned with the recess of the fixing base 56 so that one side of theend of the bending and shaping member 122 is located in the recess ofthe fixing base 56, while the other side of the end of the bending andshaping member 122 is located in the groove of the fixing piece 58. Thefixing piece 58 is fastened to the fixing base 56 by screws 61 passingthrough the fixing holes of the fixing piece 58 to be locked in thescrew holes of the fixing base 56, thereby realizing the lockingconnection between the flexible connector 12 and the second housing 133.

Two positioning holes 62 are formed in the connecting portion 54, twopositioning studs 64 are arranged on the inner side wall of the secondhousing 133 corresponding to the positioning holes 62, screw holes areformed in the positioning studs 64, and two through holes 66 are formedin the first housing 112 corresponding to the positioning holes 62.Screws 68 pass through the through holes 66 and the positioning holes 62in sequence and then are engaged in the screw holes of the positioningstuds 64, thus realizing the locking connection between the firstsupport 11 and the flexible connector 12. In the illustrated embodiment,the neck fan 10 further comprises a snap cap 70. An area on the innerside wall of the first housing 112 corresponding to the through holes66, for example, a connecting end of the first housing 112 is providedwith a mounting groove 72. After being fastened in the through holes 66,heads of the screws 68 are located in the mounting groove 72, and thesnap cap 70 is mounted to the mounting groove 72 in a snap fit mode toshield the screws 68 from being exposed, so that the appearance of theproduct is more attractive.

As described above, a locking connection is formed between the bendingand shaping member 122 of the flexible connector 12 and the secondhousing 133 of the support 13 and another locking connection is formedbetween the first housing 132 of the support 13 and the soft rubbersleeve 121 of the flexible connector 12. That is, a double lockingmechanism is formed between the flexible connector 12 and the support 13which makes the connection between the flexible connector 12 and thesupport 13 more stable, thus making the structure of the neck fan stableand firm.

Embodiment 5

As shown in FIG. 12 to FIG. 14, a portable blowing device provided bythe present embodiment is also a neck fan, which comprises an arc-shapedbody for resting on the neck of the human body and fans 20 arranged inthe body. The body comprises a connector 12 and supports 13 arranged atopposite two ends of the connector 12. Preferably, the connector 12 isan arc-shaped flexible connector 12. A fan 20 and a driving device 400are arranged in each support 13, and each support 13 comprises an outerhousing 200 (i.e., the outer side wall of the support 13) and an innerhousing 210 (i.e., the inner side wall of the support 13), wherein theinner housing 210 is located on a side close to the neck of the humanbody and the outer housing 200 is located on a side away from the neckof the human body. Preferably, the driving device 400 in one support 13is fixed on the outer housing 200, and the driving device 400 in theother support 13 is fixed on the inner housing 210. The driving device400 is configured to drive the fan 20 to rotate.

In the neck fan of the above embodiment, the driving device 400 in onesupport 13 is fixed to the outer housing 200 while the driving device400 in the other support 13 is fixed to the inner housing 210, and thenthe fans 20 are respectively connected with the driving devices 400, sothat the left and right fans 20 have the same assembly direction whenthe neck fan is put on the neck of the human body, and the left andright fans 20 can be of the same type, which solves the problem thaterrors tend to occur during fan assembly and improves the universalityof the fan. Because the left and right fans are exchangeable, theproduction cost is reduced, the assembly process is simplified, and theerror rate is reduced.

In one embodiment, as shown in FIG. 15, the driving device 400 comprisesa stationary part 408 and a rotating part 410. The stationary part 408of the driving device 400 in one support is fixed on the inner side wallof the outer housing 200, while the stationary part 408 of the drivingdevice 400 in the other support is fixed on the inner side wall of theinner housing 210. The rotating part 410 is fixedly connected with thefan 20 so that the fan 20 is rotatable with the rotating part 410.

The stationary part 408 is provided with a through hole at its axialcenter. The fan 20 comprises an impeller 300 and a rotating shaft 310.The rotating shaft 310 is rotatably inserted into the through hole ofthe stationary part 408, so that the rotating part 410 is rotatable withrespect to the stationary part 408 to thereby drive the impeller 300 torotate. In other embodiments, a rod 206 is arranged on the inner surfaceof the outer housing 200 where the stationary part 408 is installed. Thestationary part 408 is sleeved on the rod 206 and fixedly connected withthe outer housing 200. The rod 206 is of a hollow structure. Therotating shaft 310 of the fan 20 is rotatably inserted into the rod 206,so that the stationary part 408 cooperates with the rotating part 410 todrive the impeller 300 to rotate about the axis of the rod 206.

Specifically, in the present embodiment, the driving device is describedas a motor, and the stationary part 408 acts as a stator of the drivingdevice 400. Each of the housings located at opposite ends of thearc-shaped body 10 is provided with a stator inside, one stator beingfixed on the inner surface of the outer housing 200 and the other statorbeing fixed on the inner surface of the inner housing 210. The rotatingpart 410 acts as a rotor of the driving device 400. A chamber is formedaround the rotating shaft 310 of the fan. The rotor is received in thechamber and tightly attached to an inner wall of the chamber. When therotating shaft 310 is inserted into the through hole or the rod 206, thestator is located in the chamber and cooperates with the rotor to formthe driving device 400. After being electrified, the rotor rotates todrive the fan impeller 300 to rotate.

In the above embodiment, the left and right fans can be assembled in thesame direction, which solves the problem that the two fans are notexchangeable and assembly errors tend to occur in a traditional neck fandue to the left and right fans of the traditional neck fan are in amirror-image relation.

In other embodiments, the driving device 400 comprises a motor (notshown). The motor in one support is fixed to the outer housing 200, andthe motor in the other support is fixed to the inner housing 210. Thefan 20 comprises an impeller 300 and a sleeve (not shown) which issleeved on a bearing of the motor and fixedly connected with thebearing, so that the motor drives the impeller 300 to rotate.

Specifically, in the present embodiment, one end of the motor is fixedto the inner surface of the support 13, and the other end is providedwith a rotatable bearing. Correspondingly, the fan 20 comprises animpeller 300 and a sleeve arranged at an axial center of the impeller.By the sleeve being sleeved on the bearing, the impeller 300 isconnected to the bearing. When the motor works, the rotation of thebearing drives the impeller 300 to rotate, thus realizing the normaloperation of the fan. In other embodiments, the fan comprises animpeller, and the axial center of the impeller is provided with a recessin which the bearing of the motor is fixedly received, so that the motoris capable of driving the impeller to rotate. Alternatively, the axialcenter of the impeller is provided with a through hole penetrating theimpeller, and the bearing of the motor is inserted into the through holeand fixedly connected with the impeller, so that the motor drives theimpeller to rotate. In other embodiments, the fixing method of thebearing of the motor and the impeller is not particularly limited.

In one embodiment, as shown in FIG. 16, the support 13 further comprisesa wind shield 40 which is arranged within the support 13. Through holes240, air outlets, are formed in a side face of the support 13 which is aface connected between an outer surface of the outer housing 200 and anouter surface of the inner housing 210. The wind shield 40 is configuredfor guiding the airflow generated by the fan 20 to the through holes 240where the airflow exits the support 13.

Specifically, the outer housing 200 and the inner housing 210 of thesupport 13 are assembled to form therebetween a cavity (i.e., airchannel) with one end open, the fan 20 and the driving device 400 arearranged in the cavity, and the open end of the support 13 is connectedwith the connector 12. Due to the connector 12 is hollow and the support13 is long and thin, the airflow generated by the fan 20 tends to flowto the open end of the support 13 and not easily be led out of a housing20 for cooling the user. By arranging the wind shield 40 in the support13 and the through holes 240 in the side face of the support 13, aftercoming into contact with the wind shield 230, the airflow generated bythe fan 20 flows along the wind shield 40 to the through holes 240, andthen is led out of the housing 20 to achieve the effect of cooling. Inthe present embodiment, in order to achieve a good airflow guidingeffect, the wind shield 40 is arc-shaped and extends from the side withthe through holes of the support 13 to the other side of the support 13,so that when the outer housing 200 and the inner housing 210 areassembled, a sub-air channel communicating with the through holes 240 isformed by the wind shield 40 in the cavity (air channel) formed betweenthe outer housing 200 and the inner housing 210, and the extendingdirection of the wind shield 40 is along the flow direction of theairflow, which makes the airflow generated by the fan 20 moreconcentrated after entering the sub-air channel and the airflow exitingthe through holes 240 be strengthened. In other feasible embodiments,the wind shield 40 can be in other shapes, which is not particularlylimited here.

In one embodiment, as shown in FIG. 14, the neck fan further comprises abending and shaping member 70 which is a universal hose. The arc-shapedflexible connector 12 is made of a flexible material such as softrubber, and the bending and shaping member 70 is arranged in thearc-shaped flexible connector 12. The bending and shaping member 70 ishollow and connecting wires such as leads can be arranged within thebending and shaping member 70. When the neck fan is used, the combinedarc-shaped flexible connector 12 and universal hose 70 can be adjustedto any angle according to requirement of the user through bending anddeforming. Meanwhile, the universal hose 70 ensures the stableconnection of the leads.

In one embodiment, as shown in FIG. 17, the neck fan further comprises aswitch 90 which is arranged on the support 13. In the presentembodiment, a through hole corresponding to the switch 90 is defined inthe outer housing 200 and the switch 90 is fixed in the through hole ofthe outer housing 200. By adjusting the switch 90, the start and stop ofthe neck fan can be realized. In addition, the wind power control of theneck fan can be realized by adjusting the switch 90.

Further, as shown in FIG. 17, the neck fan further comprises a battery50, which is arranged in the support 13. In the present embodiment, itis assumed that the battery 50 is arranged in the support 13. Byarranging the battery 50 in the support 13, when the fan 20 rotates, thebattery 50 can provide power to the driving device 400, so that the neckfan can work at any time. In other embodiments, there may be twobatteries 50, and each support 13 is provided with one battery 50 toprovide power for the corresponding driving device 400, so that the neckfan has a longer endurance. Similarly, there may be two switches 90which control the left and right driving devices 400 respectively, sothat the driving devices 400 can work independently.

In the neck fan provided by the present embodiment, the driving devicein one of the supports is fixed on the outer side wall while the drivingdevice in the other support is fixed on the inner side wall, the leftand right fans are assembled in the same direction, and the left andright fans can be of the same type, which solves the problem that errorstend to occur during fan assembly and improves the universality of thefan. Because the left and right fans are exchangeable, the productioncost is reduced, the assembly process is simplified, and the error rateis reduced.

Embodiment 6

As shown in FIGS. 18-20, a portable blowing device provided in thepresent embodiment is a neck fan which comprises a body 10 and fans 20disposed in the body 10. The neck fan can be hung on the neck of theuser through the body 10, so as to cool the user conveniently.

The body 10 comprises supports 30 and end housings 30 a connected toends of the supports 30.

As shown in FIGS. 18 and 20, the support 30 comprises an inner side wall31 close to the neck of the user and an outer side wall 32 away from theneck of the user. The inner side wall 31 and the outer side wall 32 aredetachably connected to ensure that a joint is airtight, or the innerside wall 31 and the outer side wall 32 can also be integrally formed byinjection molding or other processes. In the present embodiment, outersurfaces of the inner side wall 31 and the outer side wall 32 are bothcurved smooth surfaces. The inner side wall 31 comprises a middle area34 close to the neck of the user, and a first section 35 and a secondsection 36 located on the upper and lower sides of the middle area 34respectively. The first section 35 is provided with first air outlets350, and the second section 36 is provided with second air outlets 360.Of course, it can be understood that the outer surface of the inner sidewall 31 can have three faces with certain angles formed therebetween oradjacent faces being perpendicular to each other, the first section 35,the middle area 34 and the second section 36 are located on the threefaces respectively, and the axis of the first air outlets 350 arrangedin the first section 35 and the axis of the second air outlets 360arranged in the second section 36 are arranged at a certain angle (or inparallel).

As shown in FIG. 19, an air channel is arranged in the support 30, Inthe present embodiment, the support 30 is preferably in an arc shape,and an air guiding member 37 is arranged in the support 30.Specifically, in the present embodiment, the air guiding member 37 is inthe shape of a strip and protrudes from an inner surface of the outerside wall 32, and the air guiding member 37 extends along the bendingdirection of the support 30, A top surface of the air guiding member 37(i.e., the top surface in the protruding direction) contacts with theinner surface of the inner side wall 31 (i.e., the surface of the innerside wall 31 close the air channel) and the shapes of the top surface ofthe air guiding member 37 and the inner surface of the inner side wall31 completely match at the joint to ensure airtightness of the jointbetween the top surface of the air guiding member 37 and the innersurface of the inner side wall 31. The air guiding member 37 divides theair channel into a first air channel 301 and a second air channel 302,the first air channel 301 communicates with the first air outlets 350,and the second air channel 302 communicates with the second air outlets360. In other embodiments, the air guiding member 37 may be omitted andonly one air channel is provided in the support 30, and the inner sidewall 31 and the outer side wall 32 form a cavity acting as the airchannel. The airflow generated by the fan 20 passes through the airchannel and blows toward the neck of the user at multiple angles throughthe first air outlets 350 and the second air outlets 360, so as toachieve an improved cooling effect.

Refer to FIG. 19, the inner side wall 31 and the outer side wall 32 ofthe support 30 can be connected by a detachable connecting structure,the upper and lower sides of the inner side wall 31 are respectivelyconnected with the upper and lower sides of the outer side wall 32, oneside of the air guiding member 37 is integrally formed with the innersurface of the inner side wall 31, and the other side of the air guidingmember 37 abuts against an inner surface of the outer side wall 32.Alternatively, one side of the air guiding member 37 is integrallyformed with the inner surface of the outer side wall 32, and the otherside of the air guiding member 37 abuts against the inner surface of theinner side wall 31.

With reference to FIG. 18 and FIG. 19, in the present embodiment, theremay be a plurality of first air outlets 350 and a plurality of secondair outlets 360, and the plurality of first air outlets 350 and theplurality of second air outlets 360 in the same shape are arranged atequal intervals in the bending direction of the support 30.

As shown in FIGS. 19 and 20, in the present embodiment, the fan 20 isdisposed in the end housing 30 a. The end housing 30 a is provided withan air inlet 401, and the air inlet 401 can be of a grid structure. Theend housing 30 a is of an approximately circular structure which has ahousing center (not labeled). The fan 20 has a rotation center (notlabeled), and the rotation center of the fan and the housing center areeccentrically arranged. The fan 20 comprises a plurality of blades 21arranged around the rotation center, a tail end of each blade 21 isprovided with a deflection part 22 facing the air channel, and thedeflection directions and deflection angles of the plurality ofdeflection parts 22 are the same, so as to guide the airflow toward theair channel. In the present embodiment, preferably, the tail ends of theplurality of blades 21 rotate around the rotation center to form acircular rotation track, and the perpendicular distance D from astarting end of the air guiding member 37 to the tangent of the circularrotation track is 2-7 mm. In a preferred solution, the perpendiculardistance D from the starting end of the air guiding member 37 to thetangent of the circular rotation track can be 3-5 mm, so that theairflow generated by the fan 20 enters the first air channel 301 and thesecond air channel 302 sufficiently, so that the airflow blown out fromthe first air outlets 350 and the second air outlets 360 isstrengthened.

With reference to FIG. 19 and FIG. 20, a guiding plate 402 is arrangedin the end housing 30 a. Preferably, the guiding plate 402 is arrangedaround a periphery of the fan 20. The shape of the guiding plate 402 ispreferably in accordance with the Archimedes spiral of a centrifugalfan, so as to guide more airflow into the air channel. Preferably, theguiding plate 402 is disposed on an inner surface of the end housing 30a. The guiding plate 402 is integrally formed or detachably connectedwith the end housing 30 a.

In other embodiments, the fan 20 can also be arranged in the support 30,for example: arranged in the middle of the support 30, or arranged atthe joint of the two supports 30.

As shown in FIGS. 19 and 20, in the present embodiment, the air guidingmember 37 comprises a body part 370 protruding from the inner surface ofthe outer side wall 32. An end close to the fan 20 is defined as astarting end, and an end away from the fan 20 is defined as a tail end.Preferably, the curvature (or radian) of the body part 370 extendedbetween the starting end and the tail end is the same as that of thesupport 30 A guide plate 371 is provided at the starting end of the bodypart 370, and the guide plate 371 is offset from the extending directionof the body part 370. That is, the guide plate 371 is of an inclinedplate structure extending inclinedly from the starting end of the bodypart 370. The guide plate 371 comprises a tail end connected with thestarting end of the body part 370 and a starting end away from thestarting end of the body part 370. The starting end of the guide plate371 is closer to the upper side of the outer side wall 32 than the tailend of the guide plate 371. Therefore, the starting end of the guideplate 371 divides an inlet of the air channel into a first air inlet 303and a second air inlet 304, the first air inlet 303 corresponds to thefirst air channel 301, and the second air inlet 304 corresponds to thesecond air channel 302, that is, the first air inlet 303 and the secondair inlet 304 communicate with the first air channel 301 and the secondair channel 302 respectively. The cross-sectional area of the first airinlet 303 is smaller than that of the second air inlet 304. In apreferred solution, the cross-sectional area of the first air inlet 303is half of that of the second air inlet 304, and the volume of airflowentering the first air channel 301 and the volume of air entering thesecond air channel 302 are substantially the same. Due to thearrangement of the guide plate 371, part of the airflow blowing towardthe first air inlet 303 is diverted to the second air inlet 304, so thatthe airflow entering the first air channel 301 and the second airchannel 302 is more uniform, which allows the first air outlet 350 andthe second air outlet 360 to discharge airflow uniformly, thus avoidingthe discomfort caused by uneven air discharge from upper and lower sidesof the support 13.

The air guiding member 37 further comprises a wind shield 372 connectedto the tail end of the body part 370, and the wind shield 372 stops at atail end of the air channel. In the present embodiment, specifically, afirst wind shield 3721 and a second wind shield 3722 are provided at thetail end of the body part 370. Two ends of the first wind shield 3721are respectively connected with an upper inner surface of the outer sidewall 32 and the body part 370 to stop the tail end of the first airchannel 301, so that the airflow flows out of the first air outlets 350after passing through the first air channel 301. Two ends of the secondwind shield 3722 are connected with a lower inner surface of the outerside wall 32 and the body part 370 respectively to stop the tail end ofthe second air channel 302, so that the airflow flows out of the secondair outlets 360 after passing through the second air channel 302 andfinally reaches the neck of the user for cooling. As shown in FIGS. 19and 20, in the present embodiment, the support 30 is of a minor arcstructure, and the neck fan comprises two supports 30 of a minor arcstructure. The body 10 of the neck fan further comprises a flexibleconnector 12, and the two supports 30 are connected by the flexibleconnector 12. Preferably, the two supports 30 are symmetrically arrangedwith respect to the flexible connector 12, and when the neck fan is puton the neck of the user, the two supports 30 are respectively located onthe left and right sides of the neck of the user. The flexible connector12 comprises a soft rubber part 501 and a metal piece 502 connected withthe soft rubber part 501, and opposite ends of the metal piece 502 arerespectively connected with the two supports 30. In the presentembodiment, it is preferable to connect the metal piece 502 with the twosupports 30 first, and then wrap the metal piece 502 with the softrubber part 501 through an injection molding process, so that theflexible connector 12 is elastically deformable to allow the user tostretch the two supports to put on the neck fan easily, and the strengthof the flexible connector 12 can be increased so that the flexibleconnector 12 can be repeatedly stretched and restored to the originalstate. In the present embodiment, the soft rubber part 501 is preferablymade of a thermoplastic material with elastic deformation such as silicagel. The metal piece 502 is made of sheet-like metal with elasticdeformation. Besides being arranged in the soft rubber part 501 throughinjection molding, the sheet-like metal piece 502 can be attached to theoutside of the soft rubber part 501 by other means. In otherembodiments, the metal piece 502 can also be a metal hose structure,which is not limited here.

Embodiment 7

The present embodiment is basically the same as Embodiment 6, and thesame parts are not repeated here. The difference lies in that: as shownin FIGS. 21-23, the support 30 is further provided with an inner case 60inside, and the inner case 60 is integrally formed and provided with anair channel inside. After the inner side wall 31 and the outer side wall32 of the support 30 are assembled, the integrally formed inner case 60is located in the cavity enclosed by the inner side wall 31 and theouter side wall 32. Even if there is a small gap at the joint betweenthe inner side wall 31 and the outer side wall 32, the airflow will notescape through the joint between the inner side wall 31 and the outerside wall 32, whereby a strengthened airflow with a large volume can beoutput from the air outlets to cool the user fast. Further, in apreferred solution, the outer surface of the inner case 60 and the innersurface of the support 30 contact with each other and are matched inshape. The inner case 60 is provided with an air guiding member 37inside, and the air guiding member 37 has a structure similar to that ofthe air guiding member 37 of Embodiment 6. The air guiding member 37divides the air channel into a first air channel 301 and a second airchannel 302. The inner case 60 is provided with first air vents 601 andsecond air vents 602. The first air channel 301 communicates with thefirst outlets 350 through the first air vents 601, and the second airchannel 302 communicates with the second outlets 360 through the secondair vents 602.

Embodiment 8

The present embodiment is partially identical to Embodiment 6, and thesame parts are not repeated here. The difference lies in that: as shownin FIG. 24, the flexible connector 12 is omitted, and the support 30 canbe an integral structure. In the present embodiment, the support 30 isof a major arc configuration, and the support 30 itself can be made of amaterial with elastic restoring force, so that the support 30 can bestretched by holding its two ends to be put on.

Embodiment 9

As shown in FIGS. 25-29, a portable blowing device provided in thepresent embodiment is a neck fan configured to be put on the neck of thehuman body. The neck fan comprises a flexible connector 12 and supports13 respectively connected to opposite ends of the flexible connector 12.The structure of the support 13 of the neck fan provided in the presentembodiment is the same as that of the support 13 of the above-mentionedneck fan in Embodiment 4, so the specific structure of the support 13 isnot described here. The difference lies in the specific structure of theflexible connector 12, as shown in FIGS. 28 and 29. In the presentembodiment, the flexible connector 12 comprises a bending and shapingmember 122 and a flexible connection structure covering the bending andshaping member 122. The flexible connection structure comprises a softrubber sleeve 121 and hard parts 125 arranged at opposite ends of thesoft rubber sleeve 121 through injection molding. The hard part 125comprises a fixing portion 45 located within an end of the soft rubbersleeve 121 through injection molding and a connecting portion 48 exposedfrom the soft rubber sleeve 121. The connecting portion 48 is used forconnecting external components, such as for connecting the support 13.The flexible connection structure is also provided with a through hole49 which sequentially penetrates through the hard part 125 at one end ofthe soft rubber sleeve 121, the soft rubber sleeve 121 and the hard part125 at the other end of the soft rubber sleeve 121 in the axialdirection of the flexible connection structure, and the through hole 49allows the bending and shaping member 122 and elements such as leadsconnected between the circuit board and the fan 20 to pass through.

More specifically, the fixing portion 45 is tapered, the connectingportion 48 is square, and the fixing portion 45 and the connectingportion 48 are integrally formed. For example, the cross-sectional areaof the fixing portion 45 gradually decreases from an end close to theconnecting portion 48 to an end away from the connecting portion 48. Theconnecting portion 48 is connected to the larger end of the fixingportion 45, and a step 47 is formed between the connecting portion 48and the larger end of the fixing portion 45. A surface of an end of theconnecting portion 48 near the fixing portion 45 is provided with apositioning groove 482, and the soft rubber sleeve 121 can be integrallyconnected to the positioning groove 482 by injection molding, so thatthe positioning groove 482 is at least partially located in the softrubber sleeve 121. In the process of injection molding, the meltedmaterial to form the soft rubber sleeve 121 flows to the hard part 125and is connected with the hard part 125 after being cooled. For example,the soft rubber sleeve 121 encloses the fixing portion 45 of the hardpart 125, so that the step 47 is enclosed by an end wall of the softrubber sleeve 121, thus making the connection between the soft rubbersleeve 121 and the hard part 125 stable. Further, melted soft rubberflows into the positioning groove 482, and after the soft rubbersolidifies and hardens, the connection between the soft rubber sleeve121 and the hard part 125 is more stable. The hard part 125 cannotescape from the soft rubber sleeve 121 easily. The soft rubber sleeve121 is made of a soft rubber material, so that the soft rubber sleeve121 can bend and deform. The hard part 125 can be made of a hard rubbermaterial or metal material, as long as the hard part 125 can hardlydeform.

Two positioning holes 54 are formed in the connecting portion 48,neither of the positioning holes 54 communicates with the through hole49. The positioning holes 54 are used for being fixedly connected withthe support 13. During installation, opposite ends of the bending andshaping member 122 extend out of the through hole 49, the connectingportion 48 extends into a connecting end of the support 13, opposite endfaces of the support 13 and the soft rubber sleeve 121 abut against eachother, and an outer surface of the soft rubber sleeve 121 and an outersurface of the support 13 are connected in a smooth transition mode.With this arrangement, when the flexible connector is bent, a gapbetween the soft rubber sleeve 121 and the support 13 will not beenlarged so that the product looks more attractive, and the situationthat the connecting portion 48 is separated from the soft rubber sleeve121 and the support 13 falls off can be avoided. It should be understoodthat since the soft rubber sleeve 121 itself is made of a bendable anddeformable soft rubber material, in other embodiments, the flexibleconnector 12 may not be provided with the bending and shaping member122, so the through hole 49 may not be provided, and instead, the usermay directly bend the soft rubber sleeve 121 to realize the bendingdeformation of the neck fan.

It should also be understood that in the above embodiments, the flexibleconnector is applied to a neck fan, and in other embodiments, theflexible connector of the present disclosure can also be applied toother products such as neck massagers and earphones.

To sum up, in the flexible connector provided by the present embodiment,the hard parts are arranged at opposite two ends of the soft rubbersleeve through injection molding, the fixing parts of the hard parts areembedded in the ends of the soft rubber sleeve, so that the ends of thesoft rubber sleeve enclosing the fixing parts are hardly bent anddeformed, which effectively prevents the situation that after theflexible connector is connected with external components through theconnecting portion, when the flexible connector is bent, gaps are formedbetween the two ends of the soft rubber sleeve and the externalcomponents. The present embodiment also provides a neck fan with theflexible connector, and the neck fan further comprises supportsconnected to opposite two ends of the flexible connector. By arrangingthe hard parts at opposite two ends of the soft rubber sleeve throughinjection molding, when the flexible connector is bent, no gap appearsbetween the soft rubber sleeve and an end face of the support, whichmakes the product look more attractive.

Embodiment 10

As shown in FIG. 30 to FIG. 34, a portable blowing device provided inembodiment 10 of the present disclosure comprises a body 10 for beinghung around a neck of a human body and fans 20 arranged in the body 10.The fans 20 are preferably centrifugal fans (turbofan). An air channelcorresponding to each fan is arranged in the body 10. The air channelextends in a length direction of the body and has a side wallsurrounding the air channel.

In the present embodiment, the body 10 is C-shaped or U-shaped, and isadapted to the radian of the neck of the human body. The body 10comprises a first support 11, a second support 13, and a flexibleconnector 12 connecting the first support 11 with the second support 13.A plurality of fans 20 are arranged in each of the first support 11 andthe second support 13, for example, two fans 20 or three fans can bearranged in each of the first support 11 and the second support 13 toincrease the airflow output of the portable blowing device. The flexibleconnector 12 is provided with a bending and shaping member 121 inside,and the bending and shaping member 121 is, for example, a shaping hose,so that the flexible connector 12 can maintain its bent shape afterbeing bent.

Further, the first support 11 and the second support 13 of the body 10are each provided with a receiving chamber 101, a sub-air channel 102,an air inlet 103 and air outlets 104 corresponding to each fan 20, thatis, each fan 20 has a receiving chamber 101, a sub-air channel 102, anair inlet 103 and air outlets 104 corresponding thereto. The receivingchamber 101 is used for receiving the fan 20, and the receiving chamber101 communicates with the sub-air channel 102 and the air inlet 103. Aside wall of the sub-air channel 102 is provided with the air outlets104, and the airflow generated by the fan 20 passes through the sub-airchannel 102 and then blows out from the air outlets 104. In the presentembodiment, the sub-air channels 102 of the first support 11 and thesecond support 13 are independent from each other and do not communicatewith each other. The air inlets 103 are arranged on the inner and outerside walls of the first support 11 and the second support 13, and theair outlets 104 are arranged on the upper and lower side walls of thesub-air channels 102. The air outlets 104 are elongated-shaped,Preferably, the width of the air outlets increases toward the fan 20, soas to increase the airflow speed at positions of the air outlets 103away from the fan 20.

In the present embodiment, a wind shield 16 is arranged in the airchannel to thereby divide the air channel into a sub-air channel 102formed between a side of the wind shield 16 and a part of the side wallof the air channel and a receiving cavity 107 formed between an oppositeside of the wind shield 16 and the other part of the side wall of theair channel. The sub-air channel 102 is communicated with the airoutlets 104. Airflow generated by the fan 20 is capable of entering thesub-air channel 102 and then exiting the air outlets 104. Due to thereduced volume of the sub-air channel, the airflow is concentrated afterentering the sub-air channel 102, and airflow exiting the air outlets104 is strengthened, so that the cooling effect and the user experienceare improved. The portable blowing device further comprises a battery 50received in the receiving cavity 107 and electrically connected with thefan 20. The side of the wind shield 16 facing the sub-air channel 102 isprovided with an airflow guiding slot 161, and preferably, the guidingslot 161 gradually becomes larger from an end away from the fan 20toward the fan 20.

Further, the body 10 is provided with an air guiding member 14 in eachsub-air channel 102, and the air guiding member 14 is connected to theinner and outer side walls of the sub-air channel 102 and thus dividesthe sub-air channel 102 into a first sub-air channel 102 a and a secondsub-air channel 102 b. The side walls of the first sub-air channel 102 aand the second sub-air channel 102 b are both provided with air outlets104, and the airflow generated by the fan 20 is guided to the airoutlets 104 in the upper and lower side walls of the sub-air channel 102through the air guiding member 14. The air guiding member 14 comprises afirst guiding plate 141 and a second guiding plate 142, one ends of thefirst guiding plate 141 and the second guiding plate 142 close to thefan 20 are connected with each other, and the other ends of the firstguiding plate 141 and the second guiding plate 142 away from the fan 20are connected to the side walls of the sub-air channel 102. The firstguiding plate 141 is used to define the shape of the first sub-airchannel 102 a, so that the first sub-air channel 102 a is graduallyenlarged from an end away from the fan 20 toward the fan 20, and thesecond guiding plate 142 is used to define the shape of the secondsub-air channel 102 b, so that the second sub-air channel 102 b isgradually enlarged from an end away from the fan 20 toward the fan 20.Thus, the airflow generated by the fan 20 is gradually compressed afterentering the first sub-air channel 102 a and the second sub-air channel102 b, forming an air squeeze effect, whereby a strengthened airflow isgenerated at the air outlets 104 away from the fan 20.

Further, referring to FIG. 33, the air guiding member 14 is of aV-shaped structure or Y-shaped structure, and both the first guidingplate 141 and the second guiding plate 142 are curved. The first guidingplate 141 bends toward the side away from the second guiding plate 142,and the second guiding plate 142 bends toward the side away from thefirst guiding plate 141. The volume of the first sub-air channel 102 ais smaller than that of the second sub-air channel 102 b, that is, theproportion of the first sub-air channel 102 a in the sub-air channel 102is smaller than the proportion of the second sub-air channel 102 b inthe sub-air channel 102. A curved guide vane 150 is arranged in thesecond sub-air channel 102 b. The guide vane 150 is bent away from thesecond guiding plate 142. An end of the guide vane 150 close to the fan20 is higher than an end of the guide vane 150 away from the fan 20.That is, the distance between the end of the guide vane 150 close to thefan and the lower side wall of the support is greater than that betweenthe end of the guide vane 150 away from the fan and the lower side wallof the support. The two sides of the guide vane 150 in the widthdirection closely contact with the inner walls of the second sub-airchannel 102 b, and the guide vane 150 is configured to divide/guide theairflow in the second sub-air channel 102 b to prevent all the airflowfrom flowing out from the air outlets of the second sub-air channel 102b close to the fan. In other embodiments, the guide vane 150 can also beimplemented as a straight plate, and the end of the guide vane 150 closeto the fan 20 is higher than the end of the guide vane 150 away from thefan 20, that is, the end of the guide vane 150 away from the fan 20 iscloser to the bottom wall of the sub-air channel 102 than the end closeto the fan 20.

Further, the first support 11 comprises a first outer housing 11 a and afirst inner housing lib, and the second support 13 comprises a secondouter housing 13 a and a second inner housing 13 b. In the presentembodiment, the receiving cavity 107 is located between the wind shield16 and the outer housings (the first outer housing 11 a and the secondouter housing 13 a), and the battery 50 is disposed in the receivingcavity 107.

In the present embodiment, both the first support 11 and the secondsupport 13 of the body 10 are provided with arc-shaped separators 17(FIG. 33). The separators 17 are arranged between two adjacent fans 20in each housing (the first support 11 and the second support 13) andconfigured to separate the sub-air channels 102 corresponding to the twoadjacent fans 20. The separators 17 serve as side walls of the receivingchambers 101 corresponding to the fans 20 away from the end of thehousing. In other embodiments, the separator 17 may be formed in a plateshape or other shapes. Specifically, as shown in FIG. 33, taking thefirst support 11 as an example, the two fans 20 are respectivelyarranged in the two receiving chambers 101, and the separator 17 is usedto separate the receiving chamber 101 of one fan 20 from the sub-airchannel 102 of the other fan 20, that is, to separate the sub-airchannels 102 of the two fans 20. Preferably, the air guiding member 14in one of the sub-air channels 102 is connected with the separator 17 toform an integral structure, so that one ends of the first guiding plate141 and the second guiding plate 142 of the air guiding member 14 awayfrom the fan 20 are indirectly connected with the upper and lower sidewalls of the air channel 102 through the separator 17, and the separator17 is arranged close to one of the fans 20 and bends toward the fan 20.Of course, in other embodiments, the ends of the first guiding plate 141and the second guiding plate 142 of the air guiding member 14 away fromthe fan 20 can also be directly connected with the upper and lower sidewalls of the sub-air channel 102. A cavity 106 is formed between thefirst sub-air channel 102 a and the second sub-air channel 102 b, andthe cavity 106 is spaced apart from the first sub-air channel 102 a andthe second sub-air channel 102 b, The cavity 106 can effectively absorband restrain the noise caused by the airflow generated by the fan 20hitting the air guiding member 14.

Further, the portable blowing device comprises a circuit board 55. Aswitch button 18 configured for controlling the fan 20 is arranged onthe body 10. The circuit board 55 is electrically connected with the fan20, the battery 50 and the switch button 18. In the present embodiment,the switch button 18 is arranged on the first support 11, and thecircuit board 55 is arranged between the two wind shields 16. The switchbutton 18 is used to control the start and stop of the fan 20 and theairflow speed. In the present embodiment, the portable blowing device isalso provided with an indicator light (not shown), a charging interface(not shown), etc. which will not be described in detail here.

Embodiment 11

FIG. 35 is a side view of a first inner housing of a portable blowingdevice according to the Embodiment 11 of the present disclosure. Asshown in FIG. 35, a portable blowing device provided in the presentembodiment is basically the same as the portable blowing device inEmbodiment 10 (shown in FIG. 30 to FIG. 34), except that in the presentembodiment, the first support 11 and the second support 13 are eachprovided with only one fan 20, and one receiving chamber 101, one airchannel, one air guiding member 14, one guide vane 150 and one windshield 16 corresponding to the fan 20. The inner and outer side walls ofthe receiving chamber 101 are provided with air inlets 103, and theupper and lower side walls of the sub-air channel 102 are provided withair outlets 104. In the present embodiment, the first support 11 and thesecond support 13 need not be provided with the separators 17.

Embodiment 12

As shown in FIG. 36 to FIG. 38, a portable blowing device provided inthe present embodiment is basically the same as the portable blowingdevice in Embodiment 10 (as shown in FIG. 30 to FIG. 34). In the presentembodiment, the portable blowing device also comprises a first support11, a second support 13 and a connector 12 connecting the first support11 with the second support 13, except that the first support 11 and thesecond support 13 are each provided with only one fan 20, and onereceiving chamber 101, one air channel, one air guiding member 14, oneguide vane 150 and one wind shield 16 corresponding to the fan 20. Thewind shield 16 is arranged in the air channel such that a sub-airchannel 102 is formed between one side of the wind shield 16 and a partof the side wall of the air channel and a receiving cavity is formedbetween an opposite side of the wind shield 16 and the other part of theair channel. A circuit board 55 is received in the receiving cavity. Theinner and outer side walls of the receiving chamber 101 are providedwith air inlets 103, the sub-air channel 102 is divided into a firstsub-air channel 102 a and a second sub-air channel 102 b by the airguiding member 14, the side walls of the first sub-air channel 102 a andthe second sub-air channel 102 b are both provided with air outlets 104.The first support 11 comprises a first outer housing 11 a and a firstinner housing 11 b, and the second support 13 comprises a second outerhousing 13 a and a second inner housing 13 b. In the present embodiment,the air guiding members 14 in the first support 11 and the secondsupport 13 are respectively assembled and fixed to the first innerhousing lib and the second inner housing 13 b (i.e., the side wall ofthe sub-air channel 102), and the split design facilitates the moldingand manufacturing of the first inner housing 11 b, the second innerhousing 13 b and the air guiding members 14. Specifically, the airguiding member 14 further comprises a connecting plate 143 connectingthe first guiding plate 141 with the second guiding plate 142, whereinthe connecting plate 143 is generally triangular and fixed to the innerside wall of the first inner housing 11 b/the second inner housing 13 b(i.e., the side wall of the air channel 102), and the first guidingplate 141 and the second guiding plate 142 extend perpendicularly fromopposite side edges of the connecting plate 143 and are sandwichedbetween the two side walls of the sub-air channel 102. Preferably, theends of the first guiding plate 141 and the second guiding plate 142facing the fan 20 are connected to form a V-shape. In the direction awayfrom the fan 20, the first guiding plate 141 extends obliquely towardthe upper side wall of the first support 11 and the second guiding plate142 extends obliquely toward the lower side wall of the first support11, and the distance between the first guiding plate 141 and the secondguiding plate 142 increases gradually in the direction away from the fan20. In this way, the first sub-air channel 102 a and the second sub-airchannel 102 b both have a tapered structure in the airflow direction(i.e., in the direction away from the fan 20), which facilitate to forma squeezing effect on the airflow, so that the airflow can have a higherairflow speed and greater air pressure at the air outlets 103.

Further, the inner side wall of the first inner housing 11 b/secondinner housing 13 b is provided with a positioning stud 18, theconnecting plate 143 is correspondingly provided with a positioning hole19, and the positioning stud 18 is inserted in the positioning hole 19to thereby position the connecting plate 143 on the inner side wall ofthe first inner housing 11 b/second inner housing 13 b. In the presentembodiment, the first guiding plate 141 and the second guiding plate 142of the air guiding member 14 each comprise two sections, one section isintegrally formed with/connected to the inner side wall of the firstinner housing 11 b/the second inner housing 13 b, that is, the sectionaway from the fan 20 is integrally formed with/connected to the innerside wall of the first inner housing 11 b/the second inner housing 13 b,and the other section is connected to the connecting plate 143.Specifically, the tail ends of the sections of the first guiding plate141 and the second guiding plate 142 near the fan 20 are provided withL-shaped locking parts 145, and the starting ends of the sections of thefirst guiding plate 141 and the second guiding plate 142 away from thefan 20 are provided with L-shaped locking grooves 146, and the L-shapedlocking parts 145 are respectively locked in the L-shaped lockinggrooves 146 to thereby form the completed first guiding plate 141 andthe completed second guiding plate 142, namely the air guiding member14.

Referring to FIG. 36, in the present embodiment, the axial center of thefan 20 and the center of the receiving chamber 101 are eccentricallyarranged with a gap 105 formed between the fan 20 and the side wall ofthe receiving chamber 101. The gap 105 is C-shaped and gradually widensin the rotating direction of the fan 20. The gap 105 has opposite twoopenings at both ends thereof. In the present embodiment, the rotatingdirection of the fan 20 as shown in FIG. 36 is clockwise, and a largerone of openings of the gap 105 faces the first sub-air channel 102 a.The airflow generated by the fan 20 blows obliquely toward the lowerside wall of the sub-air channel 102, that is, the airflow generated bythe fan 20 tends to flow into the second sub-air channel 102 b, but theairflow generated by the fan 20 arrives at the first sub-air channel 102a firstly and then arrives at the second sub-air channel 102 b. Thevolume of the first sub-air channel 102 a is designed to be smaller thanthat of the second sub-air channel 102 b, so that the air intake volumeof the first sub-air channel 102 a is equal to that of the secondsub-air channel 102 b.

In the present embodiment, the first support 11 and the second support13 are respectively rotatably connected with opposite ends of theconnector 12 through rotating structures, that is, the first support 11and the second support 13 can rotate relative to the connector 12 toadjust the width between the first support 11 and the second support 13,so that the user can easily put on the portable blowing device or removethe portable blowing device from the neck of the human body. Theconnector 12 is also provided with a semiconductor temperature controldevice which comprises a heat sink 51 arranged in the connector 12, aheat conducting member 52 arranged on the inner side wall of theconnector 12, a semiconductor refrigeration sheet 53 mounted between theheat sink 51 and the heat conducting member 52, and a cooling fan 54arranged at one end of the heat sink 51. More specifically, the innerside wall of the connector 12 defines an opening 155 corresponding tothe heat sink 51. A mounting enclosure 56 is mounted to the opening 155.The mounting housing 56 can be fixed to the inner side wall of theconnector 12 through interlocking means or the like. The mountingenclosure 56 is provided with a mounting recess 57 for receiving thesemiconductor refrigeration sheet 53. The heat conducting member 52 isin an arc shape adapted to the neck of the human body, and the heatconducting member 52 is connected to one side of the mounting enclosure56 away from the heat sink 51, for example, through interlocking meansor the like. The heat sink 51 comprises a connecting plate and aplurality of cooling fins extending from the connecting plate in adirection away from the semiconductor refrigeration sheet 53, whereinthe plurality of cooling fins are arranged at intervals, and a radiatinggroove is formed between two adjacent cooling fins. In the lengthdirection, one end of the connecting plate extends beyond the coolingfins, the cooling fan 54 is at least partially located on the other endof the connecting plate, and an air outlet of the cooling fan 54 facesthe radiating groove to cool the cooling fins. After installation, acold end face of the semiconductor refrigeration sheet 53 is attached tothe heat conducting member 52, and a hot end face of the semiconductorrefrigeration sheet 53 is attached to the connecting plate of the heatsink 51. Heat dissipation holes 58 and air inlets 59 respectivelycorresponding to the heat sink 51 and the cooling fan 54 are formed onthe outer side wall of the connector 12. Heat accumulated at the heatsink 51 is dissipated from the heat dissipation holes 58, and air entersthe cooling fan 54 through the air inlets 59.

In order to further stabilize the accurate positioning of thesemiconductor temperature control device and its components, a mountinghole 61 is formed in the connecting plate, a through hole is formed inthe inner side wall of the connector 12 and a screw hole is formed inthe mounting housing 5. A screw is passed through the mounting hole 61and the through hole of the connector 12 to be fixed in the screw holeof the mounting housing 56, so that the heat sink 51 and the mountinghousing 56 are fixed to the connector 12. The inner side wall of theconnector 12 is also provided with a positioning piece 62, and thepositioning piece 62 abuts against a side edge of the cooling fan 54 toinstall and position the cooling fan 54, so that the cooling fan 54 canbe stably installed.

Preferably, a decorative ring 63 is arranged on a peripheral wall of theopening 155. When the mounting enclosure 56 is connected to theconnector 12, the decorative ring 63 has a decorative function to makethe product look more attractive.

Further, partition plates 64 are arranged between the heat dissipationholes 58 and the air inlets 59, and the partition plates 64 are locatedbetween the heat sink 51 and the cooling fan 54. The partition plate 64has a blocking function and can prevent the heat from the heat sink 51from returning to the air inlets of the cooling fan 54 and affect heatdissipation. In addition, the partition plates 64 also coordinate withthe positioning piece 62 to position the cooling fan 54, so that thecooling fan 54 is clamped between the positioning piece 62 and thepartition plates 64 stably.

Specifically, the rotating structure comprises a first connecting member71 and a second connecting member 72, one ends of the first connectingmember 71 and the second connecting member 72 cooperate with each otherthrough a pivoting structure consisted of a rotating shaft and a shafthole to realize rotary connection, and the other ends are respectivelyfixedly connected with the connector 12 and the first support 11/secondsupport 13, for example, through screws or snap connection means, sothat the first support 11 and the second support 13 can rotate inwardlyor outwardly relative to the connector 12. Specifically, the firstconnecting member 71 comprises a first stationary part and two firstpivot parts connected to one end of the first stationary part andarranged at intervals, wherein the first pivot part is provided with ashaft hole; and the second connecting member 72 comprises a secondstationary part and a second pivot part connected to one end of thesecond stationary part, and the second pivot part is provided with ashaft hole. During installation, the first stationary part extends intothe end of the connector 12 for being fixed with the connector 12, thesecond stationary part extends into the ends of the first support 11/thesecond support 13 for fixing therewith, the second pivoting part extendsbetween the two first pivoting parts, and a rotating shaft is insertedinto the shaft hole, thereby realizing rotary connection between thefirst connecting member 71 and the second connecting member 72.

Preferably, the rotating structure further comprises a damping memberfor increasing the frictional resistance of the first support 11/secondhousing 12 when the first support 11/second support 12 rotating relativeto the connector 12, and enabling the first support 11/second support 13to stay at any rotating position stably relative to the connector 12,thereby preventing the first support 11/second support 13 from rotatingrelative to the connector 12 arbitrarily (without external force). Inthe illustrated embodiment, the damping member is a damping ring 74.There are two damping rings 74 which are respectively sandwiched betweenthe second pivot part and the two first pivot parts.

Since the joint of the first connecting member 71 and the secondconnecting member 72 is exposed from the connector 12 and the firsthousing 11/second support 13, in order to ensure the aestheticappearance of the product, in the illustrated embodiment, the rotatingstructure is enclosed with a silicone sleeve 75, and opposite ends ofthe silicone sleeve 75 are connected with the ends of the first support11 and the second support 12 respectively. As the silicone sleeve 75 ismade of a soft material, it will be elastically deformed along with therotation of the rotating structure, so it will not affect the rotationof the rotating structure. The outer surfaces of opposite ends of thesilicone sleeve 75 can be configured to be in smooth transition with theouter surfaces of the first support 11 and the second support 13, so asto enhance the aesthetic appearance of the product. Preferably, somegrooves 76 facilitating deformation of the silicone sleeve 75 may beformed on the silicone sleeve 75, so that the silicone sleeve 75 is moreeasily bent and deformed along with the deformation of the rotatingstructure when the rotating structure rotates.

In the present embodiment, metal sheets 111 are respectively installedon the side walls of the receiving chamber 101 corresponding to bothsides of the fan 20, and the air inlets 103 are air inlet meshesprovided on the metal sheets 111, thus effectively preventing the user'shair from entering the fan 20.

The above-mentioned embodiments merely represent several implementationsof the present application, and the descriptions thereof are morespecific and detailed, but they shall not be understood as a limitationon the scope of the present application. It should be noted that, forthose of ordinary skill in the art, variations and improvements maystill be made without departing from the concept of the presentapplication, and all of which shall fall into the protection scope ofthe present application. Therefore, the scope of protection of thepresent application shall be subject to the appended claims.

What is claimed is:
 1. A portable blowing device, comprising: a body forbeing hung around a neck of a human body, the body comprising an innerside wall defining an inner air inlet and an outer side wall defining anouter air inlet; and a fan disposed in the body; wherein a channel isarranged in the body, and the channel extends in a length direction ofthe body; a wind shield is arranged in the channel to divide the channelinto a sub-air channel and a receiving cavity, and air outlets areformed in the body for communicating with the sub-air channel andoutside; and airflow generated by the fan is capable of entering thesub-air channel via the inner air inlet and the outer air inlet and thenexiting the air outlets.
 2. The portable blowing device according toclaim 1, wherein a battery and a circuit board electrically connectedwith the fan are arranged in the receiving cavity, and the circuit boardis further electrically connected with a switch exposed from the body.3. The portable blowing device according to claim 2, wherein both sidesof the wind shield are bent and extended toward the outer side wall toform hems so that a groove is formed between the hems, and the batteryis at least partially received in the groove.
 4. The portable blowingdevice according to claim 1, wherein a partition is further arranged inthe channel, the wind shield divides the channel into a first cavity anda second cavity, and the partition is arranged in the second cavity anddivides the second cavity into the sub-air channel and a sub-cavity, thefirst cavity forming the receiving cavity.
 5. The portable blowingdevice according to claim 1, wherein the body comprises a flexibleconnector and two supports respectively connected to two opposite endsof the flexible connector, the flexible connector comprises a bendingand shaping member and a soft rubber sleeve enclosing the bending andshaping member, the two opposite ends of the flexible connector arerespectively provided with connecting parts for extending into thesupports, the connecting portions are provided with positioning holes,and fasteners pass through the positioning holes and are locked andconnected to corresponding supports.
 6. The portable blowing deviceaccording to claim 1, wherein the body comprises multiple said sub-airchannels each comprising a fan receiving chamber in which one said fanis provided and a corresponding air passage communicated with the fanreceiving chamber.
 7. The portable blowing device according to claim 1,wherein the body comprises a connector, and a first support and a secondsupport respectively connected to two opposite ends of the connector;the fan is arranged in the first support and another fan is arranged inthe second support; driving devices configured for driving the fans torun are respectively arranged in the first support and the secondsupport; and the first support and the second support each comprise onesaid outer side wall away from the neck of the human body and one saidinner side wall close to the neck of the human body, the driving devicein one of the first support and the second support is fixed to the outerside wall, and the driving device in the other of the first support andthe second support is fixed to the inner side wall.
 8. The portableblowing device according to claim 1, wherein the body comprises asupport in which the fan, the air channel and the wind shield arearranged; and wherein an air guiding member is arranged in the sub-airchannel to divide the sub-air channel into a first sub-air channel and asecond sub-air channel, the support comprises a first section and asecond section located on opposite sides of the air guiding member, theair outlets comprise first air outlets provided at the first section andcommunicating with the first sub-air channel, and second air outletsprovided at the second section and communicating with the second sub-airchannel.
 9. The portable blowing device according to claim 8, whereinthe support comprises one said inner side wall close to the neck of thehuman body and one said outer side wall away from the neck of the humanbody, the first air outlets and the second air outlets are formed in theinner side wall, a starting end of the air guiding member divides aninlet of the sub-air channel into a first air inlet and a second airinlet, the first air inlet and the second air inlet respectivelycommunicate with the first sub-air channel and the second sub-airchannel, and an area of the first air inlet is smaller than that of thesecond air inlet.
 10. The portable blowing device according to claim 1,wherein the body comprises a connector and two supports respectivelyconnected to opposite ends of the connector, a semiconductor temperaturecontrol device is arranged at the connector, and the semiconductortemperature control device comprises a contact surface exposed from aninner side wall of the connector.
 11. The portable blowing deviceaccording to claim 1, wherein the body defines a width direction and aheight direction, the sub-air channel and the receiving cavity beinglocated at opposite sides of the wind shield along the height direction,the inner air inlet and the outer air inlet being arranged at intervalsalong the width direction.
 12. The portable blowing device according toclaim 1, wherein the wind shield comprises opposite edges extendingalong the length direction of the body and contacting inner surfaces ofthe channel.
 13. The portable blowing device according to claim 1,wherein a cover is provided to cover the outer air inlet with a spaceformed between the cover and an outer surface of the outer side wall toallow air to flow therethrough.
 14. The portable blowing deviceaccording to claim 1, wherein the air outlets comprise a plurality ofthrough holes arranged at intervals, sizes of the through holes near thefan being larger than sizes of the holes away from the fan; or the airoutlets comprise a plurality of through holes arranged at intervals, atleast portions of the through holes being elongated holes eachcomprising a length side and a width side, the length side beingparallel to the length direction of the body.
 15. The portable blowingdevice according to claim 1, wherein one of the inner side wall and theouter side wall comprises a mounting portion for mounting the fanthereon, the fan comprising multiple blades extending along an axialdirection of the fan, the axial directions of the fan and the bladesbeing substantially perpendicular to the mounting portion.
 16. Theportable blowing device according to claim 1, wherein the inner sidewall comprises a mounting portion for mounting the fan thereon and aplurality of ribs extending from a periphery of the mounting portionradially, spaces formed between adjacent ribs cooperatively forming theinner air inlet.
 17. The portable blowing device according to claim 1,wherein the body comprises two supports in which the air outlets aredefined and a connector without air outlet defined therein, theconnector being connected between the two supports.
 18. The portableblowing device according to claim 1, wherein the body comprises twosupports and a connector connected between the two supports by screws,the supports defining recesses for accommodating the screws, coversbeing attached to the recesses of the supports to cover the screws. 19.The portable blowing device according to claim 1, wherein the airoutlets are arranged along an extending direction, the inner air inletand the outer air inlet being located at opposite sides of an extensionline of the air outlets in the extending direction.
 20. A portableblowing device, comprising: a body for being hung around a neck of ahuman body; and a fan disposed in the body; wherein a channel isprovided in the body, and the channel extends in a length direction ofthe body and has a side wall surrounding the air channel; a wind shieldis arranged in the channel and connected with an inner surface of theside wall so that a sub-air channel is formed between the wind shieldand the side wall, and air outlets are formed in the side wall forcommunicating with the sub-air channel and outside; airflow generated bythe fan is capable of entering the sub-air channel and then exiting theair outlet; and wherein a guide vane is arranged in the sub-air channel.